FRIDAY, 10:09am: The Lions have officially signed one more undrafted free agent, inking Robert Morris offensive lineman A.J. Dalton to a contract, tweets Dave Birkett of the Detroit Free Press. Dalton received a $2.5K signing bonus, per Birkett (via Twitter).

While none of those players was expected to be a real contributor in Detroit this season, there are a couple notable names in the group. Isles is a rugby speedster who was considering coming to camp with the Lions, while Potter had been expected to compete for the kicking job vacated by David Akers.